AQA MERGED QUESTION PAPER AND MARK SCHEME 2025 GCSE COMPUTER SCIENCE 8525/1A, 8525/1B, 8525/1C Paper 1 Computational thinking and programming skills

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GCSE
COMPUTER SCIENCE
Paper 1 Computational thinking and programming skills – C#

Monday 12 May 2025 Afternoon Time allowed: 2 hours

, 2
Do not write
outside the
Answer all questions. box




0 1 Figure 1 shows a program written in C#.

• Line numbers are included but are not part of the program.

Figure 1

1 // C# program
2 int a = 1;
3 int b = 1;
4 int c = 5;
5 while (b < c) {
6 a = a + a;
7 b = b + 1;
8 Console.WriteLine(a);
9 }


0 1 . 1 Where is an arithmetic operation first used in the program in Figure 1?

Shade one lozenge.
[1 mark]
A Line number 1

B Line number 5

C Line number 6

D Line number 8


0 1 . 2 Which of the following is a false statement about the program in Figure 1?

Shade one lozenge.
[1 mark]


A This program contains a comment.

B This program uses assignment.

C This program uses concatenation.

D This program uses iteration.




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, 3
Do not write
outside the
0 1 . 3 State the relational operator used in the program in Figure 1. box

[1 mark]




0 1 . 4 Complete the trace table for the program in Figure 1.

You may not need to use all the rows in the table.
[4 marks]

a b c Output




7




Turn over for the next question




Turn over ►


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, 4
Do not write
outside the
0 2 A coffee shop has a loyalty scheme which rewards customers for buying drinks. box

The customer gets one stamp on their loyalty card for each individual drink they buy.

• Every 4th stamp on the card gets the customer a free biscuit.
• Every 5th stamp on the card gets the customer a free pastry.
• When the customer reaches 20 stamps, they get a free cake (but no biscuit or
pastry).

The C# program shown in Figure 2 should display whether the customer gets a free
biscuit, pastry, cake or nothing free for each of their first 20 drinks.

For each drink purchased, the program must output either: "Free biscuit",
"Free pastry", "Free cake" or "Nothing free".

Some parts of the program have been replaced with the labels to .

Figure 2

int i = 1;
while (i <= 20) {
if (i % 20 == 0) {
Console.WriteLine("Free cake");
}
else if ( ) {
Console.WriteLine("Free pastry");
}
else if (i % 4 == 0) {
;
}
else {
;
}
i = i + 1;
}

0 2 . 1 State the C# code that should be written in place of the labels in the program
written in Figure 2.
[3 marks]




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